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Note 7 - Pension and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

Schedule of Costs of Retirement Plans [Table Text Block]

		Pension Benefits								Postretirement Benefits
		Three Months Ended September 30,								Three Months Ended September 30,
		2022				2021				2022				2021
Service cost		$	496			$	636			$	287			$	365
Interest cost			580				467				190				163
Expected return on plan assets			(665	)			(907	)			-				-
Amortization of prior service cost			-				-				(282	)			(282	)
Recognized actuarial loss			379				423				92				145
Settlement loss			4,759				388				-				-
Net periodic benefit cost (a)		$	5,549			$	1,007			$	287			$	391

		Pension Benefits								Postretirement Benefits
		Nine Months Ended September 30,								Nine Months Ended September 30,
		2022				2021				2022				2021
Service cost		$	1,642			$	2,034			$	860			$	1,096
Interest cost			1,745				1,252				570				490
Expected return on plan assets			(2,169	)			(2,707	)			-				-
Amortization of prior service cost			-				-				(847	)			(847	)
Recognized actuarial loss			1,314				1,482				276				435
Settlement loss			6,355				2,116				-				-
Net periodic benefit cost (a)		$	8,887			$	4,177			$	859			$	1,174